CN115093851A - Small-particle-size nitride narrow-band green fluorescent powder and preparation method thereof - Google Patents
Small-particle-size nitride narrow-band green fluorescent powder and preparation method thereof Download PDFInfo
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- 239000000843 powder Substances 0.000 title claims abstract description 56
- 108010043121 Green Fluorescent Proteins Proteins 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 150000004767 nitrides Chemical class 0.000 title claims abstract description 14
- 239000000956 alloy Substances 0.000 claims abstract description 44
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 44
- 229910052751 metal Inorganic materials 0.000 claims abstract description 42
- 239000002184 metal Substances 0.000 claims abstract description 42
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000000227 grinding Methods 0.000 claims abstract description 23
- 239000002243 precursor Substances 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 19
- 238000005245 sintering Methods 0.000 claims abstract description 17
- 239000002994 raw material Substances 0.000 claims abstract description 16
- 239000002245 particle Substances 0.000 claims abstract description 14
- 238000001354 calcination Methods 0.000 claims abstract description 9
- 150000002642 lithium compounds Chemical class 0.000 claims abstract description 7
- 150000003377 silicon compounds Chemical class 0.000 claims abstract description 7
- 238000005303 weighing Methods 0.000 claims abstract description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 26
- 239000011812 mixed powder Substances 0.000 claims description 21
- 238000007789 sealing Methods 0.000 claims description 20
- 238000010438 heat treatment Methods 0.000 claims description 13
- 238000002844 melting Methods 0.000 claims description 12
- 230000008018 melting Effects 0.000 claims description 12
- 229910052757 nitrogen Inorganic materials 0.000 claims description 12
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 12
- 229910052721 tungsten Inorganic materials 0.000 claims description 12
- 239000010937 tungsten Substances 0.000 claims description 12
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- 238000002156 mixing Methods 0.000 claims description 9
- 239000000126 substance Substances 0.000 claims description 9
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- IDBFBDSKYCUNPW-UHFFFAOYSA-N lithium nitride Chemical compound [Li]N([Li])[Li] IDBFBDSKYCUNPW-UHFFFAOYSA-N 0.000 claims description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 5
- 229910052744 lithium Inorganic materials 0.000 claims description 5
- 239000011863 silicon-based powder Substances 0.000 claims description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 2
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- 238000003723 Smelting Methods 0.000 abstract 2
- 229910052782 aluminium Inorganic materials 0.000 abstract 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract 1
- 229910052786 argon Inorganic materials 0.000 abstract 1
- 229910052788 barium Inorganic materials 0.000 abstract 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 abstract 1
- OGPBJKLSAFTDLK-UHFFFAOYSA-N europium atom Chemical compound [Eu] OGPBJKLSAFTDLK-UHFFFAOYSA-N 0.000 abstract 1
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- C09K11/7728—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing europium
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- C09K11/0883—Arsenides; Nitrides; Phosphides
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Abstract
The invention discloses narrow-band green phosphor powder of small-particle-size nitride and a preparation method thereof 1‑x Li 2 Al 2 Si 2 N 6 :xEu 2+ Can be excited by both near ultraviolet and blue light. Weighing various raw materials according to a stoichiometric ratio, and repeatedly turning and smelting metal barium, metal aluminum and metal europium in an argon arc smelting furnace to obtain an alloy precursor; grinding into alloy powder, adding silicon compound and lithium compound, calcining in a pressure sintering furnace under nitrogen atmosphere, and grinding to obtain the narrow-band green fluorescent powder of nitride with small particle size. The preparation method utilizes an alloy nitriding method to obtain a pure-phase product with uniformly distributed particle composition at a relatively low temperature and in a short reaction time, and prepares the fluorescent powder which has good micron-scale luminous efficiency and narrower half-peak width and can be used for Micro/Mini-LED devices under easier reaction conditions.
Description
Technical Field
The invention belongs to the technical field of luminescent display materials, relates to narrow-band green fluorescent powder for a high-performance Micro/Mini-LED device, and particularly relates to narrow-band green fluorescent powder of nitride with small particle size and a preparation method thereof.
Background
In order to improve display color and enhance visual effect, the Micro/Mini-LED as a backlight display device has high luminous efficiency, high color saturation, high contrast, self-luminescence, and low energy consumptionAnd the service life is long, so that the development of the fluorescent powder with proper peak position, narrow emission peak, high photoluminescence quantum efficiency and good thermal stability to meet the requirements of Mini/Micro-LED backlight display is of great significance. Efforts are being made today to develop narrow-band emitting green or red phosphors. Typical commercial light emitting diodes are backlit by a GaN-based blue emitting chip (λ =460nm), narrow-band green emitting β -SiAlON: eu (Eu) 2+ And red light emission K 2 SiF 6 ：Mn 4+ And (3) combining the components. Because the human eye is more sensitive to green light, one of the major challenges in backlighting LEDs is to find a new, narrower band, and appropriately sized green emitter. The current mainstream green luminescent materials for Mini/Micro-LED backlight display mainly comprise beta-SiAlON: eu (Eu) 2+ And perovskite type CsPbBr 3 Quantum dots of which CsPbBr 3 Quantum dots are considered to be a promising material for backlight display green emission due to their high luminous efficiency and narrow-band emission. However, its poor thermal stability and degradation phenomena in the environment limit its commercial application. Commercial green phosphor β -SiAlON: eu (Eu) 2+ The preparation conditions are harsh, which also limits its application.
The Micro/Mini-LED still faces many problems in the production process, such as mass transfer technology, Micro-processing technology, full-color technology, etc., which severely limits the industrialization and market popularity of the Micro/Mini-LED. There are two solutions to the full-color technology of one of the problems: one is RGB three-color chip process, and the other is blue light chip + quantum dot. In the second scheme, the quantum dots have the problems of stability and service life, and the light stability and the heat stability of the inorganic fluorescent powder are far higher than those of the quantum dots. Therefore, how to keep high brightness while making the size of the inorganic phosphor small is one of the challenges to realize full color display of next generation Micro/Mini-LED.
The main preparation method of the inorganic nano luminescent material in the prior art is a high-temperature solid phase method. The high-temperature solid phase method is simple in principle and beneficial to large-scale production. However, the uniform distribution of doped ions is difficult to realize, the particle size of the product is large and difficult to control, and the current requirements of the fluorescent powder for the Mini/Micro-LED are difficult to meet, so that a novel efficient fluorescent powder preparation method for the Mini/Micro-LED, which can be produced in a large scale, is urgently needed in both scientific research and market development.
Disclosure of Invention
The invention aims to provide a small-particle-size nitride narrow-band green fluorescent powder for a Micro/Mini-LED device with micron grade, high brightness and high performance.
The invention also aims to provide a preparation method of the narrow-band green fluorescent powder.
In order to realize the purpose, the technical scheme adopted by the invention is as follows: the narrow-band green phosphor powder is micron-sized lithium nitride phosphor powder, and the chemical general formula of the narrow-band green phosphor powder is Ba 1-x Li 2 Al 2 Si 2 N 6 : xEu 2+ Wherein x is more than or equal to 0.01 and less than or equal to 0.05; the narrow-band green fluorescent powder can be excited by near ultraviolet and blue light, and has a maximum emission peak in a wavelength range of 500-600 nm.
The particle size of the lithium nitride fluorescent powder is 0.6-1.1 μm.
The invention adopts another technical scheme that: the preparation method of the narrow-band green fluorescent powder specifically comprises the following steps:
1) according to the chemical formula Ba 1-x Li 2 Al 2 Si 2 N 6 : xEu 2+ (x is more than or equal to 0.01 and less than or equal to 0.05), and accurately weighing the following raw materials:
respectively weighing metal Eu, metal Ba and metal Al in a glove box; putting all the weighed metal raw materials into a sealing bag;
respectively weighing lithium compound and silicon compound in a glove box, wherein the lithium compound adopts Li 3 N, LiF, LiH, lithium-containing amide, or lithium-containing chloride; the silicon compound being Si 3 N 4 Or Si powder;
2) transferring the metal raw material in the sealed bag into an electric arc melting furnace, repeatedly melting for multiple times, and naturally cooling to room temperature to obtain alloy precursor (Ba) 1-x Eu x Al 2 ) Transferring the alloy precursor into a glove box by using a sealing bag,crushing and grinding into alloy powder;
3) mixing alloy powder, a lithium compound and a silicon compound in a glove box, grinding and uniformly mixing to obtain mixed powder, transferring the mixed powder into a tungsten crucible, transferring the tungsten crucible into an air pressure sintering furnace, and avoiding the mixed powder from directly contacting with air in the transferring process; and (2) pumping air in the air pressure sintering furnace to a vacuum state with the vacuum degree of less than 0.1Pa, introducing high-purity nitrogen, heating to 900-1050 ℃ at the heating rate of 10 ℃/min under the condition that the nitrogen air pressure is 0.3-0.6 MPa, calcining for 3-4 hours, cooling along with the furnace, and grinding to obtain the small-particle-size nitride narrow-band green fluorescent powder for the high-performance Micro/Mini-LED device.
The invention relates to narrow-band green phosphor Ba 1-x Li 2 Al 2 Si 2 N 6 : xEu 2+ Compared with other nitride fluorescent powders, lithium nitride can effectively react with other nitride raw materials at high temperature due to the volatilization of lithium at low temperature, so that the preparation of lithium nitride by using the nitride raw material with low reactivity is very difficult and needs strict and accurate reaction temperature and air pressure. However, the alloy raw material with high reactivity is directly used as a precursor to participate in the reaction, so that the problems can be effectively avoided. Therefore, the invention can prepare the narrow-band green fluorescent powder Ba under the condition of large-range reaction temperature by an alloy nitriding method 1-x Li 2 Al 2 Si 2 N 6 : xEu 2+ . Meanwhile, because the alloy is easy to be crushed into small-particle-size particles, the alloy is used as a precursor to effectively avoid mixing O 2- The half-peak width of the emission peak of the fluorescent powder is widened, the problem of serious sintering in the preparation process of a high-temperature solid phase method can be inhibited, more particles with surface defects are reduced in the grinding process, and depolymerization can be achieved by slight grinding. These advantages are the prerequisite for the synthesis of narrow-band phosphors with small particle size and high performance. This is not comparable to the high temperature solid phase method of the prior art, so the alloy nitriding method employed in the present invention is not replaceable by the high temperature solid phase method.
The narrow-band green fluorescent powder can be applied to high-performance Micro/Mini-LED devices.
The preparation method adopts an alloy nitriding method to obtain a pure-phase product with uniformly distributed particle components at a relatively low temperature and within a short reaction time. Is a cost effective and easily scalable process for obtaining advanced phosphors. Compared with the traditional high-temperature solid phase method, the preparation method is simpler and more efficient, and the alloy is used as a precursor to optimize related synthesis methods and parameters, so that micron-sized BaLi with good micron-sized luminous efficiency and narrower half-peak width is prepared under easier reaction conditions 2 Al 2 Si 2 N 6 : 0.03Eu 2+ Narrow-band green fluorescent powder and can be produced in large scale. The method is beneficial to providing a new idea and way for realizing the full-color Micro/Mini-LED.
Drawings
FIG. 1 is a comparison graph of XRD patterns and standard data cards of narrow-band green phosphors prepared in examples 1-5.
FIG. 2 is an SEM photograph of a narrow-band green phosphor prepared in example 3.
FIG. 3 shows the excitation and emission spectra of the narrow-band green phosphor prepared in example 3.
FIG. 4 is a comparison chart of the emission spectra of the narrow-band green phosphors prepared in examples 1 to 5.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Example 1
According to the chemical formula Ba 0.99 Li 2 Al 2 Si 2 N 6 : 0.01Eu 2+ According to the stoichiometric ratio of the elements of Ba, Al and Eu, 5.4381g of metal Ba, 2.1585g of metal Al and 0.0607g of metal Eu are respectively weighed in a glove box, the metal Ba, the metal Al and the metal Eu are put into a sealing bag and are moved into an electric arc melting furnace, the metal Ba, the metal Al and the metal Eu are repeatedly and reversely melted for 3 times, and the metal Ba, the Al and the Eu are cooled along with the furnace to obtain an alloy precursor; filling the alloy precursor into a sealing bag, moving the sealing bag into a glove box, and crushing and grinding the sealing bag into alloy powder; 0.5739g of alloy powder, 0.1254g of Li 3 N and 0.2806g of Si 3 N 4 Mixing and grinding in agate mortar to obtain mixed powder, placing the mixed powder into tungsten crucible, transferring into air pressure sintering furnace, and transferringIn the process, the mixed powder is prevented from directly contacting with the air; pumping air in a gas pressure sintering furnace to a vacuum state with the vacuum degree of less than 0.1Pa, introducing high-purity nitrogen, heating to 950 ℃ at the heating rate of 10 ℃/min under the condition that the nitrogen gas pressure is 0.3MPa, calcining for 3 hours, cooling to room temperature along with the furnace, grinding to obtain the narrow-band green fluorescent powder Ba for the high-performance Micro/Mini-LED device 0.99 Li 2 Al 2 Si 2 N 6 : 0.01Eu 2+ 。
Example 2
According to the chemical formula Ba 0.98 Li 2 Al 2 Si 2 N 6 : 0.02Eu 2+ The method comprises the following steps of (1) weighing 5.3832g of metal Ba, 2.1585g of metal Al and 0.1216g of metal Eu in a glove box according to the stoichiometric ratio of the elements of the Ba, the Al and the Eu, putting all weighed metals into a sealing bag, moving the sealing bag into an electric arc melting furnace, repeatedly carrying out reverse melting for 3 times, naturally cooling the sealing bag to room temperature to obtain an alloy precursor, moving the alloy precursor into the glove box through the sealing bag, and crushing and grinding the alloy precursor into alloy powder; 0.5739g of alloy powder, 0.1254g of LiF and 0.2806g of Si were mixed in a glovebox 3 N 4 Fully mixing and grinding the mixture evenly in an agate mortar to obtain mixed powder, transferring the mixed powder into a tungsten crucible, transferring the tungsten crucible into an air pressure sintering furnace, and avoiding the mixed powder from directly contacting with air in the transferring process; pumping air in the air pressure sintering furnace to a vacuum state with the vacuum degree of less than 0.1Pa, introducing high-purity nitrogen, heating to 1000 ℃ at the heating rate of 10 ℃/min under the condition of the nitrogen air pressure of 0.4MPa, calcining for 3 hours, cooling to room temperature along with the furnace, grinding to obtain the narrow-band green fluorescent powder Ba for the high-performance Micro/Mini-LED device 0.98 Li 2 Al 2 Si 2 N 6 : 0.02Eu 2+ 。
Example 3
According to the chemical formula Ba 0.97 Li 2 Al 2 Si 2 N 6 : 0.03Eu 2+ In the stoichiometric ratio of Ba, Al and Eu elements, 5.3283g of metal Ba, 2.1585g of metal Al and 0.1824g of metal Eu are respectively weighed in a glove box, all weighed metal raw materials are put into a sealing bag and are moved into an electric arc melting furnace to be repeatedly melted, and are naturally cooled to room temperature to obtain an alloy precursor, and the alloy precursor is prepared by the steps ofTransferring the alloy precursor into a glove box by using a sealing bag, and crushing and grinding the alloy precursor into alloy powder; 0.5739g of alloy powder, 0.1254g of LiH and 0.2806g of Si powder are mixed in a glove box, the mixture is fully mixed and ground uniformly in an agate mortar to obtain mixed powder, the mixed powder is transferred into a tungsten crucible and then is transferred into an air pressure sintering furnace, and the mixed powder is prevented from directly contacting with air in the transfer process; pumping air in the air pressure sintering furnace to a vacuum state with the vacuum degree less than 0.1Pa, introducing high-purity nitrogen, heating to 900 ℃ at the heating rate of 10 ℃/min under the condition that the nitrogen pressure is 0.5MPa, calcining for 3 hours, cooling to room temperature along with the furnace, and grinding to obtain the narrow-band green fluorescent powder Ba for the high-performance Micro/Mini-LED device 0.97 Li 2 Al 2 Si 2 N 6 : 0.03Eu 2+ 。
Example 4
According to the chemical formula Ba 0.96 Li 2 Al 2 Si 2 N 6 : 0.04Eu 2+ According to the stoichiometric ratio of the elements Ba, Al and Eu, 5.2734g of metal Ba, 2.1585g of metal Al and 0.2431g of metal Eu are weighed in a glove box respectively, all weighed metal raw materials are placed in a sealing bag and are moved into an electric arc melting furnace, the metal raw materials are repeatedly subjected to reverse melting for 3 times, the metal raw materials are naturally cooled to room temperature to obtain an alloy precursor, the alloy precursor is moved into the glove box through the sealing bag, and the alloy precursor is crushed and ground into alloy powder; 0.5739g of alloy powder, 0.1254g of Li were mixed in a glove box 3 N and 0.2806g of Si 3 N 4 Fully mixing and grinding the mixture evenly in an agate mortar to obtain mixed powder, transferring the mixed powder into a tungsten crucible, and then transferring the tungsten crucible into an air pressure sintering furnace, wherein the mixed powder is prevented from directly contacting with air in the transferring process; pumping air in the air pressure sintering furnace to a vacuum state with the vacuum degree less than 0.1Pa, introducing high-purity nitrogen, heating to 1050 ℃ at the heating rate of 10 ℃/min under the condition that the nitrogen pressure is 0.5MPa, calcining for 3 hours, cooling to room temperature along with the furnace, grinding to obtain the narrow-band green fluorescent powder Ba for the high-performance Micro/Mini-LED device 0.96 Li 2 Al 2 Si 2 N 6 : 0.04Eu 2+ 。
Example 5
According to the chemical formula Ba 0.95 Li 2 Al 2 Si 2 N 6 : 0.05Eu 2+ According to the method, the Ba, the Al and the Eu are added according to the stoichiometric ratio, 5.2184g of metal Ba, 2.1585g of metal Al and 0.3039g of metal Eu are weighed in a glove box respectively, all weighed metal raw materials are placed in a sealing bag, the metal raw materials in the sealing bag are moved into an electric arc melting furnace, repeated melting is carried out for 3 times, natural cooling is carried out to room temperature, an alloy precursor is obtained, the alloy precursor is moved into the glove box through the sealing bag, and crushing and grinding are carried out to obtain alloy powder; 0.5739g of alloy powder, 0.1254g of Li were mixed in a glove box 3 N and 0.2806g of Si 3 N 4 Fully mixing and grinding the mixture evenly in an agate mortar to obtain mixed powder, transferring the mixed powder to a tungsten crucible, and then transferring the tungsten crucible into an air pressure sintering furnace, wherein the mixed powder is prevented from directly contacting with air in the transferring process; pumping air in the air pressure sintering furnace to a vacuum state with the vacuum degree less than 0.1Pa, introducing high-purity nitrogen, heating to 1050 ℃ at the heating rate of 10 ℃/min under the condition that the nitrogen pressure is 0.6MPa, calcining for 3 hours, cooling to room temperature along with the furnace, grinding to obtain the narrow-band green fluorescent powder Ba for the high-performance Micro/Mini-LED device 0.95 Li 2 Al 2 Si 2 N 6 : 0.05Eu 2+ 。
XRD patterns of the micron-sized narrow-band green fluorescent powder prepared in examples 1 to 5 are shown in figure 1. The diffraction peaks of all the prepared narrow-band green phosphors can be in one-to-one correspondence with the standard data card, and no other impurity peaks are observed. The results show that pure phases are successfully prepared by the alloy nitriding method under different reaction conditions.
FIG. 2 is an SEM photograph of the narrow-band green phosphor prepared in example 3. As can be seen from the figure, the particles are irregular, more uniformly distributed and slightly agglomerated. The particle size distribution of the fluorescent powder is mainly distributed in 0.6-1.1 mu m, and the fluorescent powder can be applied to Mini-LED and Micro-LED devices.
FIG. 3 shows the excitation and emission spectra of the phosphor prepared in example 3. As can be seen from the figure, the emission spectrum of the phosphor is in the range of 500-600 nm under the 398nm excitation condition, which indicates that the emission color of the phosphor prepared in example 3 is green. The half-peak width of the emission spectrum is 61nm, which indicates that the fluorescent powder presents narrow-band green emission. Under the same excitation wavelength, the emission peak of the fluorescent powder is 539 nm. The excitation spectrum of the phosphor prepared in example 3 is broad, covers ultraviolet and partial blue light regions, can be effectively excited by the near ultraviolet chip and the blue light chip, and meets the application requirements of Micro/Mini-LED.
FIG. 4 is a comparison of the emission spectra of the phosphors prepared in examples 1 to 5. It can be seen from the figure that the emission spectrum peaks of the embodiments 1, 2, 3, 4 and 5 are 539nm respectively under 398nm excitation light source. It is illustrated that the phosphors prepared in example 1, example 2, example 4 and example 5 all emitted green colors. But the intensity varied, with the phosphor prepared in example 3 having the strongest emission intensity.
Claims (5)
1. The narrow-band green phosphor powder is characterized in that the narrow-band green phosphor powder is micron-sized lithium nitride phosphor powder, and the chemical general formula of the narrow-band green phosphor powder is Ba 1-x Li 2 Al 2 Si 2 N 6 : xEu 2+ Wherein x is more than or equal to 0.01 and less than or equal to 0.05; the green fluorescent powder can be excited by near ultraviolet and blue light, and has a maximum emission peak in a wavelength range of 510-550 nm.
2. The narrow-band green phosphor of small-particle size nitride as claimed in claim 1, wherein the particle size of the lithium nitride phosphor is 0.6 to 1.1 μm.
3. The preparation method of the narrow-band green phosphor of small-particle-size nitride as claimed in claim 1, which is characterized by comprising the following steps:
1) according to the chemical formula Ba 1-x Li 2 Al 2 Si 2 N 6 : xEu 2+ The stoichiometric ratio of the elements in the formula (I) is that the following raw materials are weighed:
respectively weighing metal Eu, metal Ba and metal Al in a glove box; putting all the weighed metal raw materials into a sealing bag;
weighing a lithium compound and a silicon compound in a glove box respectively;
2) transferring the metal raw material in the sealing bag into an electric arc melting furnace, repeatedly melting for many times, naturally cooling to room temperature to obtain an alloy precursor, transferring the alloy precursor into a glove box by using the sealing bag, and crushing and grinding the alloy precursor into alloy powder;
3) mixing the alloy powder, the lithium compound and the silicon compound in a glove box, grinding and mixing uniformly to obtain mixed powder, transferring the mixed powder into a tungsten crucible, transferring the tungsten crucible into an air pressure sintering furnace, and avoiding the mixed powder from directly contacting with air in the transferring process; and (3) exhausting air in the air pressure sintering furnace to a vacuum state with the vacuum degree less than 0.1Pa, introducing high-purity nitrogen, calcining at 900-1050 ℃ for 3-4 hours, cooling along with the furnace, and grinding to obtain the narrow-band green phosphor powder of the small-particle-size nitride.
4. The method of claim 3, wherein the lithium compound is Li 3 N, LiF, LiH, lithium-containing amide, or lithium-containing chloride; the silicon compound being Si 3 N 4 Or Si powder.
5. The method for preparing narrow-band green phosphor of nitride with small particle size as claimed in claim 3, wherein in the step 3), the nitrogen gas pressure in the gas pressure sintering furnace is 0.3-0.6 MPa, the temperature is raised to 900-1050 ℃ at a heating rate of 10 ℃/min, and the calcination is carried out for 3-4 hours.
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| US20130214314A1 (en) * | 2011-09-29 | 2013-08-22 | Beijing Yuji Science And Technology Co. Ltd | Light-emitting material of nitrogen compound, preparation process thereof and illumination source manufactured therefrom |
| CN104327854A (en) * | 2014-11-11 | 2015-02-04 | 河北利福化工科技有限公司 | Red luminescent fluorescent powder and preparation method thereof |
| CN111712934A (en) * | 2018-01-19 | 2020-09-25 | 亮锐控股有限公司 | Wavelength converting material for light emitting devices |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20130214314A1 (en) * | 2011-09-29 | 2013-08-22 | Beijing Yuji Science And Technology Co. Ltd | Light-emitting material of nitrogen compound, preparation process thereof and illumination source manufactured therefrom |
| CN104327854A (en) * | 2014-11-11 | 2015-02-04 | 河北利福化工科技有限公司 | Red luminescent fluorescent powder and preparation method thereof |
| CN111712934A (en) * | 2018-01-19 | 2020-09-25 | 亮锐控股有限公司 | Wavelength converting material for light emitting devices |
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| WANG, YICHAO等: "Pressure-Driven Eu2+-Doped BaLi2Al2Si2N6: A New Color Tunable Narrow-Band Emission Phosphor for Spectroscopy and Pressure Sensor Applications" * |
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